  :root {
      --primary-color: #1E40AF;
      /* 深蓝色主色调 */
      --secondary-color: #3B82F6;
      /* 浅蓝色辅助色 */
      --neutral-color: #F1F5F9;
      /* 中性背景色 */
      --dark-color: #0F172A;
      /* 深色文本 */
      --light-color: #FFFFFF;
      /* 浅色背景 */
      --error-color: #EF4444;
      /* 错误提示色 */
      --border-color: #E2E8F0;
      /* 边框颜色 */
  }

  * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }

  body {
      min-height: 100vh;
      display: flex;
      background-color: var(--neutral-color);
  }

  .login-container {
      display: flex;
      flex-direction: column;
      width: 100%;
  }

  @media (min-width: 768px) {
      .login-container {
          flex-direction: row;
      }
  }

  .left-panel {
      background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
      color: white;
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
      overflow: hidden;
  }

  @media (min-width: 768px) {
      .left-panel {
          width: 50%;
          padding: 4rem 6rem;
      }
  }

  .right-panel {
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 2rem;
  }

  @media (min-width: 768px) {
      .right-panel {
          width: 50%;
      }
  }

  .system-info {
      position: relative;
      z-index: 10;
  }

  .system-logo {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 3rem;
  }

  .system-logo-icon {
      background-color: rgba(255, 255, 255, 0.15);
      border-radius: 0.75rem;
      padding: 0.8rem;
      font-size: 1.5rem;
  }

  .system-title {
      font-size: clamp(1.8rem, 3vw, 2.5rem);
      font-weight: bold;
      margin-bottom: 1.5rem;
      line-height: 1.2;
  }

  .system-description {
      color: rgba(255, 255, 255, 0.85);
      margin-bottom: 3rem;
      line-height: 1.6;
  }

  .feature-list {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
  }

  .feature-item {
      display: flex;
      gap: 1rem;
  }

  .feature-icon {
      background-color: rgba(255, 255, 255, 0.15);
      border-radius: 50%;
      padding: 0.5rem;
      margin-top: 0.95rem;
  }

  .feature-content {
      display: flex;
      flex-direction: column;
  }

  .feature-title {
      font-weight: 600;
      margin-bottom: 0.3rem;
  }

  .feature-description {
      color: rgba(255, 255, 255, 0.7);
      font-size: 0.9rem;
  }

  .copyright {
      position: relative;
      z-index: 10;
      color: rgba(255, 255, 255, 0.6);
      font-size: 0.85rem;
      margin-top: 4rem;
  }

  .decorative-elements {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      opacity: 0.1;
  }

  .decorative-circle {
      position: absolute;
      border-radius: 50%;
      background-color: white;
  }

  .login-card {
      width: 100%;
      max-width: 24rem;
      background-color: white;
      border-radius: 1rem;
      padding: 2.5rem;
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
  }

  .login-title {
      font-size: 1.75rem;
      font-weight: bold;
      color: var(--dark-color);
      margin-bottom: 0.5rem;
      text-align: center;
  }

  .login-subtitle {
      color: #64748B;
      text-align: center;
      margin-bottom: 2rem;
  }

  .form-group {
      margin-bottom: 1.5rem;
  }

  .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 500;
      color: #475569;
      margin-bottom: 0.5rem;
  }

  .form-input-container {
      position: relative;
  }

  .form-input-icon {
      position: absolute;
      left: 1rem;
      top: 50%;
      transform: translateY(-50%);
      color: #94A3B8;
  }

  .form-input {
      width: 100%;
      padding: 0.85rem 1rem 0.85rem 2.5rem;
      border: 1px solid var(--border-color);
      border-radius: 0.5rem;
      font-size: 1rem;
      transition: all 0.2s ease;
  }

  .form-input:focus {
      outline: none;
      border-color: var(--secondary-color);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
  }

  .password-toggle {
      position: absolute;
      right: 1rem;
      top: 50%;
      transform: translateY(-50%);
      color: #94A3B8;
      cursor: pointer;
  }

  .remember-me {
      display: flex;
      align-items: center;
      margin: 1.5rem 0;
  }

  .remember-me input {
      margin-right: 0.5rem;
  }

  .remember-me label {
      font-size: 0.9rem;
      color: #475569;
  }

  .login-button {
      width: 100%;
      padding: 0.85rem 1rem;
      background-color: var(--primary-color);
      color: white;
      border: none;
      border-radius: 0.5rem;
      font-size: 1rem;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s ease;
      box-shadow: 0 4px 6px -1px rgba(30, 64, 175, 0.2);
  }

  .login-button:hover {
      background-color: #1E40AF;
      transform: translateY(-2px);
      box-shadow: 0 6px 8px -1px rgba(30, 64, 175, 0.3);
  }

  .login-button:active {
      transform: translateY(0);
  }

  .error-message {
      margin-top: 1.5rem;
      display: none;
  }

  .error-box {
      background-color: #FEF2F2;
      border: 1px solid #FEE2E2;
      color: var(--error-color);
      padding: 0.75rem 1rem;
      border-radius: 0.5rem;
      display: flex;
      align-items: center;
      font-size: 0.9rem;
  }

  .error-icon {
      margin-right: 0.75rem;
  }

  .forgot-password {
      text-align: center;
      margin-top: 1.5rem;
  }

  .forgot-password a {
      color: var(--secondary-color);
      text-decoration: none;
      font-size: 0.9rem;
  }

  .forgot-password a:hover {
      text-decoration: underline;
  }

  @keyframes shake {

      0%,
      100% {
          transform: translateX(0);
      }

      10%,
      30%,
      50%,
      70%,
      90% {
          transform: translateX(-5px);
      }

      20%,
      40%,
      60%,
      80% {
          transform: translateX(5px);
      }
  }

  .shake {
      animation: shake 0.5s cubic-bezier(.36, .07, .19, .97) both;
  }